MP3 to AAC Converter
Convert MP3 to AAC. Batch-ready, stays in your browser.
Best for importing MP3s into Apple-ecosystem video projects or iOS apps that require native AAC audio.
Drop files here
or click to browse · paste from clipboard
Accepts .MP3 · Up to 1,000 files
How it works
Drop your files
Drag and drop, click to browse, or paste from clipboard. Up to 1,000 files at once.
Click Convert
Everything runs in your browser via WebAssembly. MP3 to AAC Converter happens locally — no server involved.
Download
Download files individually or grab all at once as a ZIP.
Frequently asked questions
No. Conversion runs in your browser using ffmpeg.wasm — a full media engine compiled to WebAssembly. Your audio never touches a server.
AAC is the default audio format for Apple devices and produces better quality than MP3 at the same file size. Use this when importing audio into iMovie, Final Cut Pro, or any iOS app that expects AAC, or when you need the file to play natively on Apple hardware without extra codecs.
No. MP3 is lossy — quality lost during the original MP3 encoding is permanent. Converting to AAC re-encodes the already-compressed audio, so the output matches the MP3 source quality, not the original recording.
192 kbps AAC — a solid balance between file size and quality. At this bitrate, AAC sounds comparable to a 256 kbps MP3, and the file is roughly 40% smaller than a 320 kbps MP3.
Yes. Drop as many files as you need. Each converts separately in your browser and results download as a ZIP.